Retaining adapter



FIG. 1 is a front perspective view of a retaining adapter.

FIG. 2 is a rear perspective view of the retaining adapter of FIG. 1.

FIG. 3 is a front view of the retaining adapter of FIG. 1.

FIG. 4 is a rear view of the retaining adapter of FIG. 1.

FIG. 5 is a side view of the retaining adapter of FIG. 1.

FIG. 6 is a top view of the retaining adapter of FIG. 1; and,

FIG. 7 is a bottom view of the retaining adapter of FIG. 1. 

CLAIM The ornamental design for a retaining adapter, as shown and described. 